At high altitude, there isn’t much resistance because of the lack of oxygen. … Jet engines compress the air internally, making it much thicker and providing adequate oxygen for combustion.
How do jet engines get enough air at high altitudes?
Jet engines work more efficiently at high altitude because the air is cooler. … Hence, the larger the expansion of the air when heated, the faster the aircraft moves because it is the expansion of air that drives the turbines of the jet engine which generates more power for lesser fuel burn.
Where does a jet get the oxygen for its engine?
The Basics of Cabin Oxygen
The answer to this question is actually relatively simple: Airplanes get fresh oxygen to use in the cabin from the air outside the fuselage. Regardless of the airplane’s size or flight elevation, there’s plenty of fresh oxygen available in the surrounding air.
At what altitude do jet engines stop working?
Without LOX or rocket assistance, the limit is around 140,000 feet (40 km) at around Mach 15.
How do jets fly in low oxygen?
Planes have lower oxygen levels
As a plane flies, air that flows through the engine gets sucked in, compressed, cooled, filtered, and pumped into the cabin.
Why do planes go faster at higher altitudes?
The higher the better
One of the central reasons behind aircraft altitude is that, as the air gets thinner with every foot climbed, planes can travel more easily and therefore move faster and burn less fuel, saving money.
How much oxygen does a jet engine need?
Then the weight of the oxidizer would weight down the aircraft. For each kilogram of pure octane (one of the components of jet fuel) you would need around 1.7 kilogram of pure O2.
At what altitude do you need oxygen when flying?
For Part 91 General Aviation operations the required flight crew must use supplemental oxygen for any portion of the flight that exceeds 30 minutes above a cabin pressure altitude of 12,500 feet mean sea level (MSL) up to and including 14,000 feet (MSL).
At what height is there no oxygen?
It refers to altitudes above a certain point where the amount of oxygen is insufficient to sustain human life for an extended time span. This point is generally tagged as 8,000 m (26,000 ft, less than 356 millibars of atmospheric pressure).
Why is it called afterburner?
An afterburner (or reheat in British English) is an additional combustion component used on some jet engines, mostly those on military supersonic aircraft. … Afterburning injects additional fuel into a combustor in the jet pipe behind (i.e., “after”) the turbine, “reheating” the exhaust gas.
Do airplanes have less oxygen?
The air on a plane contains less oxygen than the air we normally breathe in. This leads to lower levels of oxygen in the blood. If you do not have a lung condition, the drop in oxygen is not enough that you would feel the difference.
What happens if you stand in front of a jet engine?
If you’re standing somewhere near an active jet engine, you’re not going to survive. … These titanium blades suck a gigantic volume of air into the engine to be mixed with fuel within the engine’s nacelle, then combust into the hot gas that would create thrust.
Are jet engines more efficient than propellers?
As a matter of fact, turbojet engines are most efficient at high speeds and high altitudes, while propellers are more efficient at slow and medium speeds at lower altitudes. Propellers become less efficient as the speed of the aircraft increases with the altitude respectively.
Do airplanes pump oxygen?
Answer: No. The cabin is pressurized between 6,000 and 8,000 feet on long flights. Adding supplemental oxygen is not necessary, because the percentage of oxygen is the same as being on the ground at those altitudes. Question: Why can’t airplane vents go into “recirculation” mode like an automobile?
Do jet engines have air filters?
Both aircraft engines and gas turbines are expensive investments that require regular maintenance, but aircraft engines follow a much more extensive maintenance schedule. … In short, gas turbine air filters are built to protect the turbine against pollution in the ambient air.